Description
Buffer overflow in the log2vis_utf8 function in pyfribidi.c in GNU FriBidi 0.19.1, 0.19.2, and possibly other versions, as used in PyFriBidi 0.10.1, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted Arabic UTF-8 string that causes original 2-byte UTF-8 sequences to be transformed into 3-byte sequences.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pyfribidi | 0.10.0-2 | — |
| Debian 13 | pyfribidi | 0.10.0-2 | — |
| Debian 12 | pyfribidi | 0.10.0-2 | — |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=565997
- FEDORA-2011-0010 vendor-advisory
- FEDORA-2011-0001 vendor-advisory
- 43592 vdb-entry
- 42868 third-party-advisory
- ADV-2011-0058 vdb-entry
- fribidi-log2visutf8-bo(64619) vdb-entry
- http://sourceforge.net/tracker/?func=detail&aid=2676136&group_id=158366&atid=807545